Surely the next 'big thing' in own-your-own media will be solid state.....memory card storage and distribution of audio and video....no moving parts....and using logic access rather than 'transport buttons'.
That would be a logical progression....prior to streaming access direct, or alongside it at least.
I remember eons ago, when magnetic 'swipe' cards [eg. credit cards] came out a friend and I pondered their eventual use as media formats....and now flash memory sticks are all the rage supplanting cd burning as a reasonable-sized data portability method...